The Infant Optics Rechargeable Lithium Ion Battery is designed specifically for the DXR-8 model, providing a voltage of 3.7V and a capacity of 1200mAh. Made with lithium chemical composition, this battery ensures long-lasting power for your Infant Optics device. Its rechargeable feature allows for convenient and continuous use without the need for constant replacement, making it a reliable and efficient power source for your baby monitor.